Homework?

For most students, homework is a big part of their life. Personally, I disagree with it. For me, it's not helpful, just time consuming. I spend my entire day at school, only to come home and do more work. Without a teacher, you typically dont learn new concepts, simply practice what you already know. If I need to undersatand a concept better, I study on my own. It's the student's responsability to get extra practice when they need it so having the extra work just limits the time one can spen working on concepts they actually need to study. It's really a way to get kids who aren't responsible for themselves getting practice to practice. What do you think? Does it help you?